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Author Topic: squeaky / mosquito sound on channel  (Read 878 times)

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Offline robeti

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squeaky / mosquito sound on channel
« on: October 11, 2021, 06:52:58 PM »
Hello,

I've taped a show a few days ago.
My rig: mk41 > nbobs > babynbox > r-05

On one channel there's a squeaky/mosquito like sound.
https://we.tl/t-wLXYlZC182

Can someone explain what went wrong here?
The gear is brandnew. First time I've used it. The recorder is good as new too.
mics: schoeps mk41 (matched) | nakamichi cm-300 (JB mod/cp1/cp2/cp3) | nakamichi cm-50 | primo em4052pmi4's | sp-cmc-4u/at-853 4.7k mod (shotguns/h/c/sc/) | ca-11 c/o
power: ca-ubb | ca-9200 | nbob actives > baby nbox 
recorder: roland r-05 
video: panasonic zs100 | panasonic hdc-sd600 | sony hx9v | sony hx50v

Offline Gutbucket

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Re: squeaky / mosquito sound on channel
« Reply #1 on: October 11, 2021, 07:42:06 PM »
Was that the buzz in the air at the event?

Joking aside, if it wasn't something actually recorded, first determine if it is constant through the entire recording and if it is in both channels.  Then make some tests trying to recreate the situation. Was there anything electrical in close proximity with the recorder or preamp such as a phone?  Doesn't sound like cell phone interference, but could we some more constant EMI interference.

In the short sample it sounds constant in the left channel.  If its only in that channel, try swapping channels at the mic capsules, then at the nbox, then at the recorder, to determine if and when the buzz switches sides along with any one particular component.  If/when it does, you'll have isolated where it is coming from. May take some custom interconnects or creative temporary patching to do so.
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Offline robeti

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Re: squeaky / mosquito sound on channel
« Reply #2 on: October 12, 2021, 04:42:02 PM »
Thanks.  One channel only indeed.

Anyone else had this?
mics: schoeps mk41 (matched) | nakamichi cm-300 (JB mod/cp1/cp2/cp3) | nakamichi cm-50 | primo em4052pmi4's | sp-cmc-4u/at-853 4.7k mod (shotguns/h/c/sc/) | ca-11 c/o
power: ca-ubb | ca-9200 | nbob actives > baby nbox 
recorder: roland r-05 
video: panasonic zs100 | panasonic hdc-sd600 | sony hx9v | sony hx50v

Offline beatkilla

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Re: squeaky / mosquito sound on channel
« Reply #3 on: October 12, 2021, 06:20:04 PM »
That sucks.

If you swap capsules around does the noise follow or stay where it was?

Offline seethreepo

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Re: squeaky / mosquito sound on channel
« Reply #4 on: October 13, 2021, 05:48:10 PM »
Thanks.  One channel only indeed.

Anyone else had this?

Assuming you only have one set of cables to test (& no bodies), you might be able to go to a local music store with cables / bodies and ask to demo/test your caps. 
"Never heard anyone say that music was the thing that fucked up their day" 
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Offline Nosmo King

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Re: squeaky / mosquito sound on channel
« Reply #5 on: October 18, 2021, 01:41:55 AM »
Any chance you have a somewhat longer sample, preferably one between songs so there's no music to mask the noise?

Thanks!

Offline ero3030

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Re: squeaky / mosquito sound on channel
« Reply #6 on: October 19, 2021, 03:58:46 PM »
Record something at home and reproduce it?  Swap caps and right/left cables one at a time with headphones on to check for issues.  Check all batteries with a volt meter after recharging.  Ed
« Last Edit: October 20, 2021, 06:05:04 PM by ero3030 »
needin some fishhead music!

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